John dayock



Letters'Patent No. 60,702, dated January 1. 1867.

' Inrnovsnr'nrm woon-srmrme MACHINES.

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I, JOHN DaVOCK, of No. 788 Eleventh Avenue, in the city, county, and State of New York, have invented a newl and useful Improvement inWood-Ghopping Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specication, in whichi Figure 1 is a front elevation of thernachine.

Figure 2 is a vertical section through the lines A B and C D.

Similar letters of reference indicatfcbrresponding parts in the two figures.

This invention consists principally inrattaching the knife or knives to a rotary spindle, which works in a cross-head, movingA between slides up and down in vertical direction. It also consists' in a novel arrangement of providing for the shoving down of the wood from the knife. It also consists in the combination, with the crosshead, of a lever, rack, and 'wheel to give the requisite rotary motion to the spindle and the knife or knives. It further consists in an' improved feeding arrangement, in lorder to save the belt'which is used for carrying the wood into the machine from destruction, hereinafter described. It also consists in a certain device for the purpose of changing the depth of the stroke of the knife or knives without altering the stroke of the crank, as hereinafter described. i

To enable others skilled in the'art to make and apply my invention, I will proceed to describe its construction and-operation. I

AX AX represent a stout frame of wood or other suitable material, to which the different parts of the machine are attached. BX is a single crank-shaft, provided with driving pulley CX, ily-wheel DX, and connectingrod E, which is attached at a to the cross-head F, in order to give the required vertical reciprocating motion to said cross-head. There are also two slide pieces, b b1, fastened to the inner side of the frame to serve as a guide for the motion of the cross-head. This cross-'head is made open in order to give room for the wheels o ol and fast collar d, on the rotary spindle Gr alsonfor the horizontal reciprocating motion'of the rack e and its connectingrod, This rod, f, is attached to Ythe rack e at g, and at h to the lever H, which is of suitable shape, and has its fulcrum at z in a joint on top .of the cross-head F. 'The lever H is also provided with a slot on one end to receive the connecting-pin z' of the rodf, in order to change the stroke of the rack e. The rodf is also provided on bothends with different holes in orderlte lengthen or shorten the rod f for the same purpose. The cross-head F is bored out to receive the rotaryispinidle Gg'which is shown by dotted lines in the drawing, and has a suitable* shaped plate, K, on its lower end for the purpose of fastening the knife Z, or any desired number of knives, in any. desired position to said spindle.l There are also two collars on that spindle; one of them, marked al, is secured by means of a-taper pin, m, to said spindle in order to support the weight of the rotary spindle with the attached knife or knives, therefore allowing the wheels and rack to be moved easier than it could be done if the collar d wouldb'e loose on said spindle. The other collar, all, turns loose on the spindle G, between the lower face ofthe cross-head and the plate K, andais considerably longer than collar d, as shown in the drawing. Now, in order to change the depth of the stroke of the knife or knives, the spindle has to be taken out of -tlie cross-head, and the relative position of the two collars changed, so that collar d1 would come in place of collar-d. The lower collar, d1, is also provided with a corresponding hole for the taper pin m, in order to secure v'said collar to the spindle Gr for the purpose already described. K1 represents an adjustable guide for the rack e. It is also provided with a slot in order to raise it to a corresponding height after the changing of said collars. A screw, n, secures it to the cross-head. 0n top of the collar d is a small toothed wheel, o1, which is keyed to the spindle Gr. There also a larger toothed wheel, o, on top of it, to which is attached a suitable spring, p, and catch,.p1, which works into the toothed wheel ol iu order to produce the required rotary motion of the spindle G. -The wheel o turns loose on the spindle, and is moved by the horizontal reciprocating motion of the rack e. The connection of the rod f with the rack e and lever H is already described. There is also attached to the frame A an adjustable rod, q,`and pin, New, in the upward motion of the cross-head, the end, r, of the lever'H strikes against the rod g and forces the other end of the lever up, and-consequently the attached rod Jfollows, draws the rack forward a certain distance, and turns the loose wheel o also. The motion of this Wheel acts upon the spring p, and causes the latch p1, which works in the toothed wheel o1, to turn the same a .4 corresponding distance. New, asthe o1 is keyed to the spindle, consequently the spindle and knife will 2 come be turned also, say about a quarter of a revolution each time. In the downward motion of the cross-head theend, r, of the lever H will strike against the pin gt, forces the other end of the lever down, and moves the rack e baolc to its former position without turning the spindle or knife. The cross-head F is also provided with three or more cams, marked s, sl, etc. A short rod, t, runs through the piste, K, oi'- the spindle G; having a square plate, u, on the lower, and a head, u, onthe upper side. A spring, 5;*2vorks between the head and the plate..

iNow, when the spindle G and plate K revolve, the rod t strikes against the inclined planes, X X, of the cams e,

el, etc., and is, forced down in order to relieve the knife Z from the wood. L represents the ch table to split the wood on. It is made of iron, and fastened to the frame A. M Ml are two feed rollers with a belt, y, around them in order to feed the blocksof wood into the machine. Those blocks are placed on top of the belt. The main improvement in this feeding arrangement is to Arun the belt y oil' in front of the table. L, so that it cannot be injured or destroyed by chopping the wood on top of it, as is the case in other machines. The arrangement for turning the feed rollers M Ml is similar to that employed in turning the spindle G, and will be easily understood by the drawing. A vertical rack, N, works inside of the frame A, and is raised by a lug or pin, c, secured to the cross-head F. The downward motion ofthe rack N is produced by its own weight. This rack works into a toothed wheel, w1, ivhch turns another one, w, of similar size, loose on the4 shaft of the roller M. A smaller toothed wheel, fr, is keyed to said shaft, Vand is turned by a. latch, x, attached to the loose wheel w, in the same way as already described. Theside board N2 N2 serves as a guide or channel for the wood to be fed into the machine. i A

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The rotary spindle G ivith the attached knife Z', or knives, in combination with the cross-head F, arranged substantially as herein shown and described. Y

2. In combination with the rotary spindle G, I' claim the vertically' sliding rod t, operated by the cams 3,31 etc., substantially as for the purpose herein specified. l l

3. The combination of the cross-head F with the lever H, rack e, connecting-mdf, and toothed wheels q o1, the whole being arranged and operating substantially as and for the purpose herein set forth.

4. I claim the arrangement and combination of the feed rollers M M endless belt y, gear-Wheels w wi, rack N, and pino, the whole being arranged and loperating substantially an and for the purpose herein speeied.`

JOHN DAVOCK` Witnesses:

C. PH. WAGNER, yHnnnr BADER.

opping plate or- 

